/*
 * @Description: 
 * @Author: changqing
 * @Date: 2021-08-29 21:58:17
 * @LastEditTime: 2021-08-29 22:05:28
 * @LastEditors: changqing
 * @Usage: 
 */
var { concat,of } = require('rxjs'); 

const sourceA = of(1, 2);
const sourceB = of(3, 4);
const sourceC = of(5, 6);

concat(sourceA, sourceB, sourceC)
.subscribe(data => {
	console.log(data);
});